ICCT 2022 Invited Speaker
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Cuiqin Dai, Chongqing University of Posts and Telecommunications, China |
Cui-Qin Dai, received the M.Sc. degree in electronics and communications engineering from Chongqing University of Posts and Telecommunications (CQUPT) in 2008, and the Ph.D. degree in communication and information system from Northeast University (NEU) in 2019, respectively. She is now a professor with the school of communication and information engineering of CQUPT. Her major research direction is “Broadband Wireless Communication Networks”. Her current research interests are in satellite communications and networking, satellite constellation design, Satellite Internet of Things (SIoT) and Satellite-Terrestrial Integrated Networks (STIN). Speech Title: Invulnerability-based Constellation Design in LEO Satellite Networks The low earth orbit (LEO) satellite networks have received increasing attention because of wider coverage, lower latency, and cost-efficient networking capabilities. However, satellite nodes or links may be attacked and invalidated, and the failure of nodes and link poses performance loss to the LEO satellite networking. To address such challenges, in this paper, an invulnerability-based LEO satellite constellation is designed to achieve higher invulnerability and lower cost. Firstly, a LEO satellite network model is established and the build link probability is derived after analyzing the dynamic network topology. Then, the invulnerability benefit is defined by quantifying complete invulnerability and cost, and the problem of LEO satellite constellation design is formulated to maximize the invulnerability benefit. Following that, a tabu search genetic algorithm combined with opposite-based learning strategy (OBL-TSGA) is proposed to obtain reasonable satellite constellation orbit parameter with the best invulnerability benefit. Simulation results show that the designed satellite constellation can obtain higher invulnerability at a lower cost. 报告题目：低轨卫星网络中基于抗毁性的星座设计 简介：低轨卫星网络因其覆盖范围大、时延低和功耗低等特性已成为当前的研究热点。低轨卫星星座设计作为其关键技术，对提高低轨卫星网络的系统性能有着重要意义。抗毁性是保障网络正常运作的前提，因此以下报告将围绕基于抗毁性的卫星星座设计工作展开。首先，在分析低轨卫星网络高动态特点的基础上给出建链概率矩阵来表征动态的拓扑；其次，从节点和链路两方面给出卫星星座抗毁性和抗毁代价的定义；接着，建立抗毁效益的优化模型的同时，设计一种基于反向学习的禁忌搜索遗传算法来求得具有最佳抗毁性的卫星星座；最后，仿真结果表明所提出的设计方案能以更低的代价提高低轨卫星网络的抗毁性。
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